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X-ray crystallography

(Encyclopedia)X-ray crystallography, the study of crystal structures through X-ray diffraction techniques. When an X-ray beam bombards a crystalline lattice in a given orientation, the beam is scattered in a defini...

laminitis

(Encyclopedia)laminitis lămˌənīˈtĭs [key], also called founder, inflammation of the lamina, the innermost layer of the hoof wall in horses, ponies, and donkeys. Although the condition usually affects only the...

sailfish

(Encyclopedia)sailfish, common name for a marine game and food fish, genus Istiophorus, belonging to the family Istiophoridae and related to the marlin. It is named for its high, wide dorsal fin (or “sail”), co...

rickets

(Encyclopedia)rickets or rachitis rəkīˈtĭs [key], bone disease caused by a deficiency of vitamin D or calcium. Essential in regulating calcium and phosphorus absorption by the body, vitamin D can be formed in t...

colligative properties

(Encyclopedia)colligative properties, properties of a solution that depend on the number of solute particles present but not on the chemical properties of the solute. Colligative properties of a solution include fr...

Constantine, Donation of

(Encyclopedia)Constantine, Donation of, Lat. Constitutum Constantini, forged document, probably drafted in the 8th cent. It purported to be a grant by Roman Emperor Constantine I of great temporal power in Italy an...

giardiasis

(Encyclopedia)giardiasis jēärdīˈəsĭs, järdīˈəsĭs [key], infection of the small intestine by a protozoan, Giardia lamblia. Giardia, which was named after Alfred M. Giard, a French biologist, is spread via...

Hodgkin's disease

(Encyclopedia)Hodgkin's disease, a type of cancer of the lymphatic system. First identified in 1832 in England by Thomas Hodgkin, it is a type of malignant lymphoma. Incidence peaks in young adults and the elderly....

Arabian horse

(Encyclopedia)Arabian horse, breed of light horse developed in Mesopotamia and N Africa, and probably the first true domesticated breed. Prized since earliest times for its superior beauty, spirit, speed, grace of ...

jumping mouse

(Encyclopedia)jumping mouse, rodent slightly larger than the common mouse, found in North America and N Asia, also called the kangaroo mouse. Its long hind legs and tail enable it to leap distances up to 12 ft (3.7...